Biolife, Volume 3, Issue 2, 2015
DOI: http://dx.doi.org/10.17812/blj2015.32.8


Research Article:




Mourya B.S1  Shyama S.K2 Sujith P.P3 , Krishnamurthi S4, Meena R.M5, Loka Bharathi P.A6*

1,3,5,6 Microbiology Laboratory, National Institute of Oceanography, Council of Scientific and Industrial Research, Dona Paula- 403 004, Goa, India.
2Department of Zoology Goa University, Talegaon Goa, India.
4Microbial Type Culture Collection & Gene Bank, Institute of Microbial Technology, Council of Scientific and Industrial Research, Chandigarh-160 036, India.

*Email: bmourya@nio.org


Abstract


The biomining can happen in basalt rocks from ridges which contains around 25% Mn in the form of different minerals and oxides due to deep sea hydrothermal activity. The prime goal of this experiment was to demonstrate Mn mobilization from natural Mn minerals and oxides using striping voltammetry from basalt near deep-sea hydrothermal vents (DSHVs) by a potential bacterial isolate R6 which was isolated from this environment. Natural basalt sample was collected from the carls berg ridge during ABP-36 cruise and was characterized by scanning electron microscopy (SEM) and X-ray diffractometry. Bacterial isolation was done in laboratory by spread plate method using 100uM Mn amended NA media plates. Isolated bacteria R6 (Accsession No. LK934696) and basalt sample were used in a laboratory batch experiment. The isolate R6 (identified as marine Bacteria Imtechella halotolerans sp.) and natural basalt rock were placed in 100% seawater in the presence and absence of an organic carbon supplement as 0.01% glucose (analogous abiotic and chemical controls systems were also included). This laboratory batch experiment was incubated in the dark at 28 ± 2 °C for 6 months and cell bio mass, pH, Eh and concentrations of mobilized Mn ions were measured over time.  The presence of the bacteria induced the release of Mn from the basalt relative to the controls, especially with the addition of the organic carbon supplement. Bacteria was able to draw significant mobilization rate 27985.91 and 4797.37 μg g-1 d-1 with and without glucose added in biological experiment part when compared with abiotic and chemical controls.  Bacterial colonies on the basalt fragments surfaces were examined by SEM which shows evidence of extrapolysaccherides secretion and mineral precipitation. The results of this study suggest that chemoorganotrophic bacteria are involved in the cycling of Mn mobilization in basalt near DSHVs.

Keywords: bacteria, basalt, mobilization, hydrothermal vent, marine, mineral



Published online on  5th April, 2015
© 2015 Published by Global Science Publishing Group, USA


How to Cite this Article

Mourya B.S  Shyama S.K Sujith P.P , Krishnamurthi S, Meena R.M and Loka Bharathi P.A (2015). Microcosom investigation of Mn mobilization in basalt rock by potential bacteria R6 from Carlsberg ridge ecosystem.  Biolife, 3(2), pp 415-427. http://dx.doi.org/10.17812/blj2015.32.8

Link to this article: http://biolifejournal.com/10.17812_blj2015.32.6.html
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Microcosom investigation of Mn mobilization in basalt rock by potential bacteria R6 from Carlsberg ridge ecosystem
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